Answer:
Cut the wrong wire and it goes boom
What has two ends but no beginning?
What has fingers and a thumb but no hand?
Not my sister nor my brother but still the child of my mother and father. Who am I?
You use it between your head and your toes, the more it works the thinner it grows. What is it?
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.